Lexer

- Renamed ::split to ::word_split, for clarity and because of the need for a
  full token split, coming next.

src/Lexer.h

@@ -65,7 +65,7 @@ public:
 
   static const std::string type_name (const Type&);
   static bool is_ws (int);
-  static void split (std::vector <std::string>&, const std::string&);
+  static void word_split (std::vector <std::string>&, const std::string&);
 
 private:
   bool is_punct (int) const;